Advertisements
Advertisements
प्रश्न
Name important defence mechanisms in plants against herbivory.
Advertisements
उत्तर
Herbivores are plants’ natural predators. Plants have evolved many morphological and chemical defences against herbivory. Acacia and cactus depend on thorns as their primary defence mechanism. Certain plants have compounds that can make herbivores sick, delay digestion, disrupt reproduction, or even kill them.
APPEARS IN
संबंधित प्रश्न
Define the following term:
Commensalism
Define the following term:
Camouflage
With the help of a suitable diagram, describe the logistic population growth curve.
Define community.
The cattle egret and grazing cattle in close association is a classic example of ______.
The number of deaths under ideal conditions is known as ______.
Define the term population interactions. State its two types.
Define population growth. Explain different types of age pyramids.
Brood parasitism is best explained by the example of ____________.
The interspecific interaction between Cuckoo and Crow is ______
Select the CORRECT match:
| I | II | ||
| i. | Competition | a. | Lichen |
| ii. | Commensalism | b. | Sea anemone and clownfish |
| iii. | Mutualism | c. | Lions and Leopards |
With the decline in the population of fig species it was noticed that the population of wasp species also started to decline. What is the relationship between the two and what could be the possible reason for decline of wasps?
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
What is homeostasis?
What is brood parasitism? Explain with the help of an example.
Give one example for the following type.
Camouflaged animal
Give one example for the following type.
Chemical defense agent
Fill in the blanks
| Species A | Species B | Type of Interaction | Example |
| + | - | ______ | ______ |
| + | + | ______ | ______ |
| + | 0 | Commensalism | ______ |
Give one example for the following:
A parasitic angiosperm
Many copepods live on the body surface of marine fish. This relationship is an example of ______.
"Some species of insects and frogs have evolved with various specific features that help them from being detected."
- Justify the statement giving reasons.
- Mention any two such features.
Mention the scientific name of protozoan parasite that causes Amoebiasis.
What happens to an inferior competitor if a superior competitor is present in the same environment?
Explain one type of mutualism.
Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below:
In the sign convention for population interactions, what does the symbol '+' represent?
What is the sign convention for the predation interaction?
Tarantulas and cacti sharing a desert habitat is an example of which population interaction?
Which population interaction type involves both species being negatively affected?
